Last Interglacial marine environments in the White Sea region, northwestern Russia
Last Interglacial marine environments in the White Sea region, northwestern Russia
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俄罗斯西北部白海地区末次间冰期海洋环境
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Glaister
中科院分区：
文献类型：
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作者：
K. GrØsfjeld;S. Funder;M. Seidenkrantz;C. Glaister
对俄罗斯西北部梅森河流域河段的海洋沉积物进行了甲藻孢囊、有孔虫和软体动物的分析。通过孢粉分析和参考当地海平面历史确定了沉积物的年代，时代为萨利安晚期至伊曼晚期(年龄约为133Kyr至119.5 Kyr)。萨利安晚期的冰川消融以北极条件为特征，但进入伊米亚几个世纪后，墨西哥湾流系统将温暖的大西洋水带入该地区。在129.8 KYR BP，大西洋水的流入明显增加，暖大西洋水的平流比现在更强，可能向东渗透得更远。软体动物、甲藻包囊和有孔虫反映了比现在更温暖的条件，最适温度出现在伊米亚全球海平面上升的早期。128KYR BP左右，海平面上升受到均衡反弹和白海航道退缩的抑制。在接下来的五六千年里，当地的低盐度层状盆地得到了发展，并成为其特点。
Marine sediments from river sections in the Mezen River drainage, northwest Russia, have been analysed for dinoflagellate cysts, foraminifers and molluscs. The sediments were dated by pollen analysis and by reference to the local sea‐level history, and are Late Saalian to late Eemian (c. 133 to 119.5 kyr in age). The Late Saalian deglaciation was characterized by Arctic conditions, but a few centuries into the Eemian the Gulf Stream system carried warm Atlantic water into the region. At 129.8 kyr BP there was a marked increase in the influx of Atlantic water, and the advection of warm Atlantic water was stronger and probably penetrated further eastwards than at present. The molluscs, dinoflagellate cysts and foraminifers reflect conditions warmer than present and that the optimum temperature occurred at the time of the early Eemian global sea‐level rise. Around 128 kyr BP, the eustatic sea‐level rise was curbed by isostatic rebound and accompanying regression and constriction of marine passages to the White Sea. Local, low‐saline, stratified basins developed and characterized the next five to six millennia.